Question

what is chloroplast?...​

Answer 1

Chloroplasts are organelles that conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells.

Or

The part of a green plant cell that contains chlorophyll and in which photosynthesis takes place.